The original developer, Radical Entertainment, was largely integrated into Activision years ago. A new studio called New Radical Games

If you want a legitimate free Prototype experience, here are the only legal methods:

The reason so many gamers are searching for a third chapter is due to the massive impact of the first two games.

: Recent leaks and surveys suggest interest in a revival or remaster, potentially involving the return of Alex Mercer, but these remain unconfirmed. Why "Free Download" Sites Are Dangerous I Can't Believe We're Getting Prototype 3

If you are looking for the specific gameplay experience of the Prototype series, there are legitimate ways to satisfy the urge:

Search data from Google Trends and torrent sites show persistent queries for "Prototype 3 download." These are often redirected to:

Prototype 3 Genre: Open World / Action-Adventure / Hack and Slash Developer: (Hypothetically) Radical Entertainment Publisher: Activision Platform: PC (Windows)